Edward thunderbolt



(No Model.)

' E. THUNDERBOLT. GOVERNOR FOR REGULATING SPEED. OF MACHINERY.

N0. 567,366. Patented. Sept. 8; 1896.

UNITED STATES PATENT OEEIcE.

EDWARD THUNDEEBOLT, oE CARLTON, VICTORIA.

GOVERNOR FOR REGULATING SPEED OF MACHINERY.

SPECIFICATION forming part of Letters Patent N 0. 567,366, datedSeptember 8, 1896.

Application filed July 10, 1896.

invented certain new and useful Improvements in Governors for Regulatingthe Speed of Machinery, of which the following is a specification.

This invention has been devised to provide improvements in connectionwith that class of machinery known as governors, that is to say,mechanism for regulating the supply of the motive fluid, gas, orelectric current to engines and the like or for operating any approvedmechanism for controlling or regulating the speed of machinery, and maybe described as follows:

I employ one or more magnetic coils capable of controlling any desiredvoltage in electricity, attached and subject to the general circuit ofan electric installation. I arrange such electromagnetic coil or coilsto operate on the speed-regulatin g gear of machinery in the mostapproved manner under the varying circumstances on the different kindsof engines, such as electric-lighting engines, where the speed is sorequired to be regulated as to increase when the increased number of.

lights are switched on and, vice versa, to decrease with the reducedswitching when lights are being turned off.

The magnetic coil is so arranged as to magnetically attract or operate abar, rod, plate, or lever which is directly or indirectly in e11-gagement with either the motive'power supply or an intermediatemechanism employed for the purpose of controlling the said motivepowersupply, such, for instance, as switches of an electric motor, or athrottle-valve of a steam-engine, or gas or oil supply to a gasengine orthe like.

In some cases the magnetic coil may operate, as aforesaid, directly orindirectly upon break-gear for reducing the speed of an engine or othermachinery.

In the accompanying drawings I have illustrated my invention as arrangedto control the motive fluid of a steamengine to work an electric-lightsupply, and in which Figure 1 shows a general view of the apparatus inelevation, a part being shown in sec- $eria1N0. 598,778. (No model.)

tion. Figs. 2, 3, and 4t show side views of parts of the apparatus.

In the drawings,A represents a lever which has a fulcrum-standard Aarranged to slide at its lower end on afixed beam B and at its upper endalong the lever A. The said lever turns upon the pins The slidingstandard A is secured in the desired position 011 the lever by means ofthe thumb-screws A The lever A has adjustably connected thereto a rod 0,which is linked to a vertical piston-rod O, carryinga piston 0 The rodChas threaded sides and passes through a slotted portion of the lever A,in which a milled screw C is set to adjust said rod. The piston C isarranged to work within a cylinder D. This cylinder D is supportedagainst the wall by a band R and has a number of V-shaped openings D,which form a comm'unication between such cylinder and an outer casing DThe aforesaid piston is arranged to control in its movement the amountof opening from the outer casing D to the cylinder, and so regulate theinlet of fluid to such cylinder. A pipe is connected to the said casingat E, by which the steam from the boilers is conducted to the casing ofcylinder D, while the cylinder has an outlet-pipe F to conduct suchfluid to .the engine. The lever A has at its side opposite to that atwhich the fulcrum is placed a magnet-core G, such core being connectedto the lever bylinked screwrods G G2 in the adjustable part G, by whichthe height of such core may be regulated. The core G is arranged todepend partially into a coil II. Said coil is secured upon a base-plateI, which rests upon a wall-bracket I. Terminals II II are attached tothe baseplate to which the circuit-wires'are connected. The coil II isprovided with a magnetic plug H for assisting to attract. the core Gandwhich has its distance from the core G adjustably arranged by thethumb-screw H and screwpin H set in the frame II.

A frame J (see Fig. 3) is attached to the fixed beam B and has a slot J,in whichthe lever A moves vertically, screws J 2 J 3 being provided tolimit the travel of the said lever.

The lever A has a safety appliance c011- nected therewith, (see Figs 1and 2,) which will automatically act to cause the piston O to close theports D, and so stop the flow of motive fluid and instantly cause theengine or motor to cease running. The attachment consists of a spring K,which is secured to the lever A at one end and to a slotted frame K atthe other end.

A pin L is arranged to project into this slotted frame and to form ahold on the spring K and lever attached when in its normal working. Thispin L has an arm L, by which it is pivoted at L to a plate M, the plateM with the attachment L being adj ustably raised or lowered by the pin Mand thumb-screws M on the fixed wall-bracket O. A vertical rod N isadjustably secured to the lever A and is arranged to engage with theproj eeting end of the pin L, its distance from such end beingadjustable by the milled nut N.

The modus operandi of the invention may be described as follows: Assumethe appliance to be connected up with the inlet-pipe E connected to thesource of fluid supply and the pipe F controlling the engine. If theapparatus be at work and an additional number of lights be switched ontothe circuit, it will immediately cause a decreased current to passthrough the coil II, and consequently a less attractive force will beexerted on the core G, thus allowing the spring K to act to raise suchcore partially out of the coil, which action will raise one end of thelever A and with it the piston-rod G and piston attached, thus openingthe V-shaped ports D in the cylinder D and allowing an inrush of steamor other motive fluid into the cylinder and through the pipe F to theengine. The speed of the engine will thereby be increased, socommunicating to the dynamo an increased speed and consequent increaseof electrical supply to maintain a greater number of lights on thecircuit. In shutting off a number of lights a reverse action will takeplace, that is, the core G will be drawn down and with it the lever A,so lowering the piston C and proportionately closing the ports D.

If the current be suddenly cut oil? from the circuit, 45

the safety appliance will. come into operation, so as to prevent theracing away of the engine. The pull of the core G will then be relaxedand the spring K will cause same to jump up and with it the rod N,secured to the lever A, so causing said rod N to strike the pin L andcause it to turn on its center If, thus releasing its opposite end fromengagement with the slotted frame K, which, now released, drops and withit the end of lever A, so causing the piston 0 connected to the le ver,to close the ports I) and thus stop the furthersupply of 'l'luid to theengine.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. In governors for regulating the speed ofmachinery-the combination of an electro magnet as G, 11 adjustablysecured to a lever as A having a sliding fulcrum-standard as A withapiston-rod as O, O adjustably secured to such lever and carrying apiston as C" which operates to open and close ports as l) in a cylinderas D such cylinder having an outer casing as D with inlet and outletpipes as E and F substantially as and for the purposes set forth.

2. In governors for regulating the speed 013' machinery-the combinationof a lever as A having a spring as K attached thereto at one end and atthe other end to a slotted frame as K in combination with a pin as L, Lcentered upon an adjustable plate as M and a vertical rod as Nadjustably connected with the lever A substantially as and for thepurposes set forth.

Signed this lSth day of May, 1896.

EDIVARD TIIUNDE' tBOLl.

itnesses:

A. HARPER, 0. IV. \VADE.

